Machine for re-dressing mill-rolls



(R0 Model.)

- D. J.. DA-VIDSON.

MACHINE FOR RE-DRBSSING MILL ROLLS. No. 489,412.

Patented Jan. 3, 1893.

3 I'AJ'"!\\\ 2 xx 1 q I a 3 4 1 1 ...M r z I w 1,: r 1 l r i r I H I 1 0A B i n 1 um Wm mom, awa 07 UNITED STATES PATENT OFFICE.

DAVID J. DAVIDSON, OF BROOKWVAY, MICHIGAN.

MACHINE FOR RE-DRESSING MILL-ROLLS SPECIFICATION forming part of LettersPatent No. 489,412, dated January 3, 1893.

Application filed May 23, 1892.

To all whom it may concern.-

Be it known that 1, DAVID J. DAVIDSON, a citizen of the United States,residing at Brockway, county of St. Clair, State of Michigan, haveinvented a certain new and useful Improvement in Machines forRe-DressingMill- Rolls; and I declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specification.

My invention relates to certain new and useful improvements in a machinefor redressing mill-rolls, and it consists of the construction,combination and arrangement of devices and appliances hereinafterspecified and claimed, and illustrated in the accompanying drawings, inwhich- Figure 1 is a view in perspective embodying my invention. Fig. 2is a vertical section through the support. Fig. 3 is a separate view ofthe shaft carrying the dressing wheel. Fig. 4 is a separate view of thedevice engaging the hub of the dressing wheel and the threaded bar. Fig.5 is a sectional view on the line 0cx Fig. 2. Fig. 6 is a sectional Viewthrough the dressing'wheel. Fig. 7 is a view in section on the line yyFig.2.

It is the purpose of my invention to provide a simple and efficientre-dressing machine, portable and adjustable, wherewith any miller mayre-dress his own rolls without removing them from the machine, theredressing machine being applied to the rolls to be re-dressed, insteadof applying the rolls to the re-dressing machine.

I carry out my invention as follows:

In the drawings A represents any suitable support.

B represents a vertical standard having a vertically adjustableengagement with said support.

B and B denote set screws to hold the standard in any position to whichit may be adjusted. Other means may be employed to serve the samepurpose as said set screws.

Engaged with the standard B is an additional standard B having a squaredportion B the two standards B B being threaded, re-

Serial No. 434,058. (No model.)

spectively, above and below said squared portion.

O and 0 denote upper and lower adjusting hand wheels engagedrespectively with the threaded portions of the standards B B Thestandard 15 is removably engaged with the upper end of the standard 13in any suitable manner, as by recessing the one, and providing the otherwith acorresponding arm B to engage in said recess.

D denotes a crane engaged upon the standards B B This crane is formedwith a hollow arm D having a squared interior portion to engage upon thesquared portion of the vertical standard B to prevent the crane fromturning laterally upon said standard.

The two hand wheels 0 O are located the one above and the other belowthe arm D whereby the arm may be adjusted upward or downward upon thevertical standards B B Said standards when united, as above described,in reality form one combined support to carry said crane. self solely,however, to a support so constructed. The opposite end of the crane is Ido not limit myalso constructed with one or more orifices at D in whichis located an adjustable supporting arm E, said latter arm constructedwith a threaded portion E and a base E adjustably engaged with the arm Ein any suitable manner. Hand wheels F F are engaged upon the threadedportion of the arm E, one above and the other below the adjacent end ofthe crane to control the adjustment of the arm E. The base E isconstructed with a channel at E to receive a bar G. Upon the extremitiesof said bar are engaged hangersHH'. These hangers carry a shaft Iprovided with a-small ulle I andarib 2' u on which is en a ed 5 7 7 I OO a sleeve or hub J. K is a dressing or emery wheel rotatable upon saidhub, and laterally movable upon said shaft. The hangers H H also carry athreaded bar L which may be provided with an operating handle L, the barL being rotatable in said hangers.

M denotes a carrier arm having a threaded engagement with the bar L, andalso with the hub of the emery wheel. It will be seen that as thethreaded bar L is rotated, as by the hand of the operator, the emerywheel will be moved to and fro upon the shaft I so as to dress the rollfrom one end to the other. It will be seen that the re-dressing machinemay thus, be readily placed adjacent to the rolls in their accustomedplace, in any desired position. The crane carries the emery wheel overthe rolls, where it may be adjusted to any desired operative position.The pulley I is belted with the shaft of the roll'to be dressed. Whenthe rolls are self in rotation by the accustomed mechanism, the emerywheel is thus rotated. By this construction the roll may revolve slowly,while the emery wheel rotates at a high rate of speed in the oppositedirection. In this manner the usual power which drives the roll drivesthe redresser also.

What I claim as my invention is:

1. In a machine for re-dressing mill rolls the combination of a support,a crane having an adjustable engagement with the support, a supportingarm having an adjustable engagement with the opposite end of said crane,and a rotatable shaft provided with a dressing roll engaged with saidarm, and means to reciprocate said roll upon said shaft substantially asdescribed.

2. In a machine for redressing mill rolls, the combination of a support,a crane having an adjustable engagement with the support, a supportingarm having an adjustable engagement With the opposite end of said crane,a rotatable shaft provided with a dressing eeaew roll engaged with saidarm, said shaft provided with a pulley, and said dressing roll laterallymovable on said shaft, substantially as described.

3. In a machine for redressing mill rolls, the combination of a support,a crane having an adjustable engagement with the support, a supportingarm having an adjustable engagement with the opposite end of said crane,a rotatable shaft provided with a dressing roll engaged with said arm,said shaft having an adjustable connection with said arm, and means ofmoving, said dressing roll laterally upon said shaft, substantially asdescribed.

4. In a machine for re-dressing mill rolls, the combination of asupporting standard, a crane adjustably engaged therewith, means toadjust the crane vertically and to prevent its lateral movement uponsaid standard, a supporting arm adjustably engaged with the opposite endof the crane, means to adjust said supporting arm, a rotatable dressingWheel suspended from said arm, and means to move the dressing Wheellaterally, substantially as described.

In testimony whereof I signed this specification in the presence of twowitnesses.

DAVID J. DAVIDSON.

\Vitnesses:

II. E. MARTIN, G. W. HANNA.

